+define Build/Patch/Default
+ $(if $(QUILT),rm -rf $(PKG_BUILD_DIR)/patches; mkdir -p $(PKG_BUILD_DIR)/patches)
+ $(call PatchDir,$(PATCH_DIR),)
+endef
+
+kernel_files=$(foreach fdir,$(GENERIC_FILES_DIR) $(FILES_DIR),$(fdir)/.)
+define Kernel/Patch/Default
+ rm -rf $(PKG_BUILD_DIR)/patches; mkdir -p $(PKG_BUILD_DIR)/patches
+ $(if $(kernel_files),$(CP) $(kernel_files) $(LINUX_DIR)/)
+ find $(LINUX_DIR)/ -name \*.rej -or -name \*.orig | $(XARGS) rm -f
+ $(call PatchDir,$(GENERIC_PATCH_DIR),generic/)
+ $(call PatchDir,$(PATCH_DIR),platform/)
+endef
+
+define Quilt/RefreshDir
+ mkdir -p $(1)
+ -rm -f $(1)/* 2>/dev/null >/dev/null
+ @( \
+ for patch in $$$$($(if $(2),grep "^$(2)",cat) $(PKG_BUILD_DIR)/patches/series | awk '{print $$$$1}'); do \
+ $(CP) -v "$(PKG_BUILD_DIR)/patches/$$$$patch" $(1); \
+ done; \
+ )
+endef
+
+define Quilt/Refresh/Package
+ $(call Quilt/RefreshDir,$(PATCH_DIR))
+endef
+
+define Quilt/Refresh/Kernel
+ @[ -z "$$(grep -v '^generic/' $(PKG_BUILD_DIR)/patches/series | grep -v '^platform/')" ] || { \
+ echo "All kernel patches must start with either generic/ or platform/"; \
+ false; \
+ }
+ $(call Quilt/RefreshDir,$(GENERIC_PATCH_DIR),generic/)
+ $(call Quilt/RefreshDir,$(PATCH_DIR),platform/)
+endef
+
+define Quilt/Refresh
+$(if $(TARGET_BUILD),$(Quilt/Refresh/Kernel),$(Quilt/Refresh/Package))
+endef
+
+define Build/Quilt
+ $(STAMP_PATCHED): $(STAMP_PREPARED)
+ @( \
+ cd $(PKG_BUILD_DIR)/patches; \
+ quilt pop -a -f >/dev/null 2>/dev/null; \
+ if [ -s ".subdirs" ]; then \
+ rm -f series; \
+ for file in $$$$(cat .subdirs); do \
+ if [ -f $$$$file/series ]; then \
+ echo "Converting $$file/series"; \
+ $$(call filter_series,$$$$file/series) | awk -v file="$$$$file/" '$$$$0 !~ /^#/ { print file $$$$0 }' | sed -e s,//,/,g >> series; \
+ else \
+ echo "Sorting patches in $$$$file"; \
+ find $$$$file/* -type f \! -name series | sed -e s,//,/,g | sort >> series; \
+ fi; \
+ done; \
+ else \
+ find * -type f \! -name series | sort > series; \
+ fi; \
+ )
+ touch $$@
+
+ $(STAMP_CONFIGURED): $(STAMP_CHECKED) FORCE
+ $(STAMP_CHECKED): $(STAMP_PATCHED)
+ if [ -s "$(PKG_BUILD_DIR)/patches/series" ]; then (cd $(PKG_BUILD_DIR); quilt next >/dev/null 2>&1 && quilt push -a || quilt top >/dev/null 2>&1); fi
+ touch $$@
+
+ quilt-check: $(STAMP_PREPARED) FORCE
+ @[ -f "$(PKG_BUILD_DIR)/.quilt_used" ] || { \
+ echo "The source directory was not unpacked using quilt. Please rebuild with QUILT=1"; \
+ false; \
+ }